I am 6'3"-210# and claustrophobic in mummy bags. Tried the WM Kodiak but couldn't do it. Have a couple Wiggys that I like but too heavy and bulky to pack sometimes.Now have a long-wide Kifaru -20 slick bag that works great. Comfortable to 0, packs small and weighs just under 5# and not the least bit constricting to me. Also synthetic insulation which I prefer.